A remote code execution risk was identified in the Moodle LMS EQUELLA repository. By default this was only available to teachers and managers, on sites with the EQUELLA repository enabled. Versions affected: 4.5 to 4.5.3, 4.4 to 4.4.7, 4.3 to 4.3.11, 4.1 to 4.1.17 and earlier unsupported versions. Versions fixed:4.5.4, 4.4.8, 4.3.12 and 4.1.18